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Elementary and Secondary Education

Assessments

Table S-14-1. Standard Errors for the Average science scale scores, selected percentile scores, and percentage of students at each achievement level, by grade: 2009

Percentile, and achievement level	Grade 4	Grade 8	Grade 12
Percentile, and achievement level	Grade 4	Grade 8	Grade 12
Average scale score	0.3	0.3	0.8
Percentile
10th	0.6	0.6	1.2
25th	0.4	0.4	0.8
50th	0.3	0.3	1.1
75th	0.3	0.2	1.0
90th	0.3	0.3	1.0

Percent at each achievement level
Below Basic	0.3	0.4	1.0
At or above Basic	0.3	0.4	1.0
At or above Proficient	0.3	0.3	0.8
At Advanced	0.1	0.1	0.2
SOURCE: U.S. Department of Education, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment, NAEP Data Explorer.

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